1. Identification of narcotics on passengers at airports or in aircraft
2. Monitoring of precipitation
3. Tracking of precipitation
4. Tracking the migration of animals
In how many of the above activities can radars be used?

1. RTGs are miniature fission reactors.
2. RTGs are used for powering the onboard system of spacecrafts.
3. RTGs can use Plutonium-238, which is a by-product of weapons development.
Which of the statements given below are correct?

1. Controlled drug delivery in patients
2. Mobile air-conditioning systems
3. Preparation of industrial lubricants
Select the correct answer using the code given below:

1. PFAS are found to be widespread in drinking water, food, and food packaging materials.
2. PFAS are not easily degraded in the environment.
3. Persistent exposure to PFAS can lead to bioaccumulation in animal bodies.
Which of the statements given above are correct?

Statement I: Giant stars live much longer than dwarf stars.
Statement II: Compared to the dwarf stars, giant stars have a greater rate of nuclear reactions.

Which one of the following is correct in respect of the above statements?